stackl.java

来自「think in java TIJ-3rd-edition-code.zip」· Java 代码 · 共 35 行

//: c09:StackL.java
// Making a stack from a LinkedList.
import com.bruceeckel.simpletest.*;
import java.util.*;
import com.bruceeckel.util.*;

public class StackL {
  private LinkedList list = new LinkedList();
  public void push(Object v) {
    list.addFirst(v);
  }
  public Object top() { return list.getFirst(); }
  public Object pop() { 
    return list.removeFirst(); 
  }
  public static void main(String[] args) {
    SimpleTest monitor =
      new SimpleTest("StackL");
    StackL stack = new StackL();
    for(int i = 0; i < 10; i++)
      stack.push(Collections2.countries.next());
    System.out.println(stack.top());
    System.out.println(stack.top());
    System.out.println(stack.pop());
    System.out.println(stack.pop());
    System.out.println(stack.pop());
    monitor.expect(new String[] {
      "CHAD",
      "CHAD",
      "CHAD",
      "CENTRAL AFRICAN REPUBLIC",
      "CAPE VERDE"
    });
  }
} ///:~